90285780 has 48 divisors (see below), whose sum is σ = 272248704. Its totient is φ = 22224000.

The previous prime is 90285749. The next prime is 90285791. The reversal of 90285780 is 8758209.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57096 + ... + 58655.

It is an arithmetic number, because the mean of its divisors is an integer number (5671848).

Almost surely, 2^90285780 is an apocalyptic number.

It is an amenable number.

90285780 is an abundant number, since it is smaller than the sum of its proper divisors (181962924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90285780 is a wasteful number, since it uses less digits than its factorization.

90285780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115776 (or 115774 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 90285780 is about 9501.8829712852. The cubic root of 90285780 is about 448.6143052814.

The spelling of 90285780 in words is "ninety million, two hundred eighty-five thousand, seven hundred eighty".